I don't really mind what the drama is about so much as when it was introduced. We're in the final stretch here and suddenly we're basically being told "Everything you thought you knew about Roji isn't really true

". Although, it has been so long it's possible that she's not
intentionally mimicking so much as it became second nature or even her actual personality.
My concern is that we're going to suddenly have a whole thing where Roji acts like she did way back when, basically changing the dynamic of their relationship and us having to learn, in essence, a whole new character.
I also suspect we're gonna get some drama where Riji is confronted because others think she's mimicking Roji